| 李强,李明,席晓凤,张德芳,史春清,王伟清.纳米比亚铜矿铜地表富集成因及意义[J].矿产勘查,2013,4(1):92-96 |
| 纳米比亚铜矿铜地表富集成因及意义 |
| A study on the genesis of the copper enrichment in earth surface in Namibia and significance |
| 投稿时间：2012-03-19 |
| DOI： |
| 中文关键词: 纳米比亚 铜矿 地表 干旱气候 |
| 英文关键词: Namibia copper ore earth’s surface arid climate |
| 基金项目: |
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| 摘要点击次数: 2275 |
| 全文下载次数: 1936 |
| 中文摘要: |
| 通过对纳米比亚北部、中部和南部的热水喷流沉积型铜矿、夕卡岩型铜矿和斑岩型铜矿的观察,发现这些不同类型的铜矿有一个共同的特征:即铜在地表以碳酸盐(主要是孔雀石)的形式富集。研究认为,产生这种富集的原因是由于纳米比亚的气候干旱。干旱的气候使地表腐殖质缺乏,地表呈现碱性环境, 因而不仅形成了遍布纳米比亚地表的钙结砾岩,也导致了地表铜的富集和氧化带铜的变贫。这种上移的水成异常呈现高值而局限、异常迁移少的特点。这种铜的地表富集与纳米比亚的土壤型铀矿的成因一致。 |
| 英文摘要: |
| Through the detailed observation of SEDEX copper, skarntype copper and porphyry copper deposits located in the north, centre and south of Namibia, there is one common characteristic of these different types copper deposits, i.e., the copper is enriched in the surface in the form of carbonate mineral (mainly malachite). As a result of the research, the authors conclude that the arid climate is the main cause of the copper enrichment. In the arid climate, due to the lack of humus and strong evaporation in the surface, the surface is in the state of alkalinity which results in the formation of the calcrete, which spread all over Namibia. Thus the copper is enriched in the surface and degraded in the oxidation zone. The upward moving aqueous abnormity presents a high value locally and limited migration. The genesis of the copper enrichment on the earth’s surface is same as the formation of soil type uranium in Namibia. |
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